.header {
    height: 60px;
    background-color: aliceblue;
    display: flex;
    box-pack:center;
    box-orient:vertical;
    display: -webkit-box;
    -webkit-box-pack:center;
    -webkit-box-orient:vertical;
}

#userInfo {
    display: inline-block;
    margin-right: 10px;
    float: right;
}